People, think for a while, there cant be traits thats are always good.
if it would be "Jock" then its downside should be slow recovery not skill points loss.
"You are able to survive in hard conditions, but you need more time to recover because of uneasy survival. This trait gives you +1 endurance, but your healing rate will be lowered to 1, and your first aid/doctor and weakened cooldowns will be double longer."
And there is another cool trait that could be added:
Gifted
You have more innate abilities than most, so you have not spent as much time honing your skills. Your statistics are better than the average person, but your skills are lacking.
All seven stats have a +1 modifier. All skills are -10%. You receive 5 less skill points per level.

Jock would be too strong, it improves you in the battle, while it reduce only your recovery time, it is too good, everyone who had free trait would take it. However, alvarez version of jock is OK, as I think.
Gifted is too strong, every pvp char will take it, as skill points loses can be substitiuted with high int and you will still have 4 additional skill points. This trait was too strong even in fallout 2.
How about Paranoid.
Like the Cautious Nature Perk, it gives +3 to PE for placement in Wilderness Encounters.
The mental cycles eaten up by the incessant planning and checking and re-checking interfere with learning, so exp is at a -10% penalty.
This is ridiculus, maybe make a trait that gives you 10 hp per level and -50%exp? you cant make traits that improve you in battle and decrease only exp getting speed, it is too strong.
What about trait that increases range of view by 10 (or 6), while decreasing PE and AG by 1 (or PE only). "Sentinel - you are watchful and patient, so you are always watching out for danger, however, it made you quite dull". Sorry for my english, if someone can name and describe it better, I would be thankful.